469219 Kamoʻoalewa
469219 Kamoʻoalewa (/kəˌmoʊʔoʊəˈlɛvə/), provisionally designated 2016 HO3, is a very small asteroid, fast rotator and near-Earth object of the Apollo group, approximately 40–100 meters (130–330 feet) in diameter. At present it is a quasi-satellite of Earth, and currently the second-smallest, closest, and most stable known such quasi-satellite (after 2023 FW13). The asteroid was discovered by Pan-STARRS at Haleakala Observatory on 27 April 2016. It was named Kamoʻoalewa, a Hawaiian word that refers to an oscillating celestial object. The Earth-like orbit and lunar-like silicates may be a result of it being lunar ejecta.
Orbit of Kamoʻoalewa in the inner Solar System | |
| Discovery | |
|---|---|
| Discovered by | Pan-STARRS |
| Discovery site | Haleakala Observatory |
| Discovery date | 27 April 2016 |
| Designations | |
MPC designation | (469219) 2016 HO3 |
| Pronunciation | /kəˌmoʊʔoʊəˈlɛvə/ Hawaiian: [kəˈmoʔowəˈlɛvə] |
Named after | Kamoʻoalewa ("the oscillating fragment") |
Alternative designations | 2016 HO3 |
Minor planet category |
|
| Orbital characteristics | |
| Epoch 2022-Jan-21 (JD 2459600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 17.16 yr (6,266 d) |
| Aphelion | 1.1042 AU |
| Perihelion | 0.8980 AU |
Semi-major axis | 1.0011 AU |
| Eccentricity | 0.1030 (885 wrt Earth) |
Orbital period (sidereal) | 1.002 yr (365.9 d) |
Mean anomaly | 107.17° |
Mean motion | 0° 59m 2.4s / day |
| Inclination | 7.7889° |
Longitude of ascending node | 66.014° |
| 305.66° | |
| Earth MOID | 0.033 AU (13 LD) |
| Physical characteristics | |
Mean diameter |
|
Synodic rotation period | 0.467±0.008 h |
| 0.20 (assumed) | |
| S (assumed) | |
| |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.